Since disulfiram has been well tolerated by thousands of patients, and there are observations that anti angiogenic therapy enhances the effect of chemotherapy (for example bevacizumab in combination with chemotherapy in colon carcinoma) we decided to conduct a clinical trial assessing the effect of the addition of this drug at moderate doses to chemotherapy which is used as one of the standard therapies in lung cancer. In order to obtain information regarding the effect of the addition of this drug, only 50% of the patients will be treated with the drug and the rest will be treated with placebo.